WASHINGTON — A U.S. grand jury added more charges against file-sharing website Megaupload and its executives, and also accused them of taking copyrighted content from sites such as YouTube for its own service, according to a new indictment released last week.

The founder, Kim Dotcom, and six others employed by the site were charged with eight additional counts of copyright infringement and wire fraud. They were originally charged with five counts of conspiracy and copyright infringement.

Dotcom and four of his co-workers have been arrested and are awaiting extradition proceedings in New Zealand and the Netherlands. Two suspects remain at large.

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They have been charged in a federal court in Virginia with a making millions of dollars from peddling copyrighted materials, including popular television shows, movies and music to millions of users around the world.

A lawyer for Megaupload was not immediately available for comment.

Previously a lawyer for the company said the site served merely as a place for users to store data online and the company has said previously it took down content upon request.

The superseding indictment said the Megaupload site had 66.6 million registered users as of January 2012 and just under 10 percent had ever uploaded a single file, suggesting most people used the site only to download infringed material, according to the U.S. Justice Department.

The indictment also accused the group of taking copyrighted material from sites such as Google’s YouTube video service for use on Megaupload websites, which have been shut down.

Dotcom’s playboy lifestyle as one of the world’s biggest Internet pirates was exposed last month after a raid by police on his home in New Zealand.

Before being arrested, Dotcom retreated to an electronically locked “safe room” in his sprawling home in Auckland, Dotcom Mansion.

Police seized 18 luxury vehicles valued at $4.9-million, including a Rolls-Royce Phantom drophead coupe and a pink 1959 Cadillac, as well as art and electronic equipment.

Many of the cars sported vanity licence plates — the one on the Rolls was “God,” while an AMG Mercedes carried “Hacker” and another was labelled “Mafia.”

Banking authorities also froze about $8.9-million in various accounts.